sélectionner tout

chemin > objet en chemin

note tool (N) + ctl+A + icone deux carré bleus+segment "Make selected segment lines" (rendre rectiligne les segments sélectionnés)

ctl+A : button "Insert new nodes into selected segments". (insérer de nouveaux noeuds aux milieux des segments sélectionnés)
You could also use "Extensions - Modify Path - Add Nodes" for dense, even distribution of nodes all over complex parts.
Even better is to use "Extensions - Modify Path - Flatten Beziers", which will only add nodes at curved areas, resulting in less useless nodes. A value of 0.3 is a good value to start with.


Feel free to once more click "Make selected segment lines".
The lines are straight
You can of course select only part of the nodes, if you only want part of the model smooth.
